Molecular Genetics Unit Quiz
Question 1
Select one answer.
10 points
The difference between the genome of an organism and the epigenome is: _____________________
A. The accumulation of mutations in the DNA sequence.
B. The epigenome refers to changes in DNA expression due to changes in DNA packaging.
C. nothing, both terms refer to the genetic content of an organism
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Question 2
Select one answer.
10 points
In an expression plasmid, the origin of replication: _________________
A. allows the bacteria to duplicate the plasmid.
B. Is the position where the base number begins at 1.
C. allows for growth of plasmid containing bacteria in the presence of antibiotics.
D. is responsible for the replication of mRNA.
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Question 3
Select one answer.
10 points
Which of these is not used in DNA replication?
A. DNA polymerase
B. Primer
C. RNA polymerase
D. Helicase
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Question 4
Select one answer.
10 points
Assuming that the genes required for Isoleucine (an amino acid) biosynthesis are contained within an operon. If the cell is grown in the presence of high amounts of isoleucine you would expect to find:
A. The repressor protein released from the operator, allowing transcription.
B. The repressor protein released from the operator, preventing transcription.
C. The repressor protein to bind to the operator, allowing transcription.
D. The repressor protein to bind to the operator, preventing transcription.
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Question 5
Select one answer.
10 points
A codon in the middle of an mRNA strand was mutated from UGU to UGA. What type of mutation is
A. nonsense
B. silent
C. missense
D. frame shift
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Question 6
Select one answer.
10 points
What do UTRs do?
A. They are proteins that regulate transcription.
B. They are proteins that regulate translation.
C. They are regions of the gene that regulate translation.
D. They are regions of the gene that regulate transcription.
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Question 7
Select one answer.
10 points
Which of the following terms refers to a region of a chromosome that has a specifiic function?
A. Genotype
B. Allele
C. Gene
D. DNA
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Question 8
Select one answer.
10 points
Mitochondria in animal cells contain DNA while only chloroplasts in plants contain DNA.
A. False
B. True
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Question 9
Select one answer.
10 points
Replication of each strand occurs in which direction.
A. opposite
B. same
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Question 10
Select one answer.
10 points
The correct order of DNA segments in an operon is:
A. Operator, promoter, structural genes.
B. Promoter, operator, structural genes.
C. Promoter, structural genes, operator.
D. Operator, structural genes, promoter.
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Question 11
Select one answer.
10 points
Which of these is not used in DNA replication?
A. DNA polymerase
B. Helicase
C. Primer
D. RNA polymerase
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Question 12
Select one answer.
10 points
A gene codes for a protein that is 500 amino acids long. Which of the following mutations is likely to be the most deleterious?
A. a nonsense mutation at the fifth codon
B. a missense mutation at the fifth codon
C. a missense mutation at the 490th codon
D. a nonsense mutation at the 490th codon
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Question 13
Select one answer.
10 points
Is the following statement true of prokaryotic cells, eukaryotic cells or both? One gene can encode multiple different proteins (different in amino acid sequence).
A. Prokaryotic
B. Eukaryotic
C. Both prokaryotic and eukaryotic
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Question 14
Select one answer.
10 points
Is the following statement true of prokaryotic cells, eukaryotic cells or both? Multiple genes can be transcribed together into a single mRNA.
A. Prokaryotic
B. Eukaryotic
C. Both prokaryotic and eukaryotic
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Question 15
Select one answer.
10 points
Separation of the original DNA strands is due to the action of:
A. helicase
B. polymerase
C. single stranded binding protein
D. RNA primers
